The Caves of Skops (French: Les Caves de Skops) is the fifth world in the original Rayman game. It consists of a gigantic cave system, which sprawls through the underground of the valley. Most of the caverns are filled with water, and the apparent absence of life gives the place an eerie atmosphere, as the sound of water dropping into pools is the only thing to disturb the deadly silence. Some of them are so dark that it is impossible to see anything without a firefly. Joe the Extra-Terrestrial's diner is located on a beach, in front of a subterranean lake. Rayman will have to punch the plug that turns on the diner lights, as well as a network of flying saucers, held with wires which make up Joe's electricity system. Strange platforms, bouncing rocks and abandoned treasures can also be found amongst stalactites and stalagmites. As Rayman reaches the depths of the caves, he starts finding lava rocks, and even unstable lakes of lava, which can start rising because of tremors.
Note that in the Rayman Junior games, wooden palisades and dancing mushrooms of various colours can also be found.